22474628221 has 2 divisors, whose sum is σ = 22474628222. Its totient is φ = 22474628220.

The previous prime is 22474628203. The next prime is 22474628237. The reversal of 22474628221 is 12282647422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16348435321 + 6126192900 = 127861^2 + 78270^2 .

It is a cyclic number.

It is not a de Polignac number, because 22474628221 - 2⁹ = 22474627709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22474628251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11237314110 + 11237314111.

It is an arithmetic number, because the mean of its divisors is an integer number (11237314111).

Almost surely, 2^22474628221 is an apocalyptic number.

It is an amenable number.

22474628221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22474628221 is an equidigital number, since it uses as much as digits as its factorization.

22474628221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 40.

The spelling of 22474628221 in words is "twenty-two billion, four hundred seventy-four million, six hundred twenty-eight thousand, two hundred twenty-one".